a) Equations for power

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4 Terms

1
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  • define power

  • the rate of energy transfer by an electrical component

2
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  • state the formula for power including energy

  • state the formula for power including potential difference and current

  • state the formula for power including only current

  • state the formula for power including only potential difference

  • P = W/t

    • power of a component (W) = energy transferred by the component (J) / time (s)

  • P = VI

    • power of a component (W) = potential difference across the component (V) x current in the component (A)

  • P = I²R

    • power of a component (W) = current in the component² (A) x resistance of the component (Ω)

  • P = V²/R

    • power of a component (W) = potential difference across the component² (V) / resistance of the component (Ω)

3
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